EP0910017A2 - Fernobjektaufrufssystem in einem verteilten System - Google Patents

Fernobjektaufrufssystem in einem verteilten System Download PDF

Info

Publication number
EP0910017A2
EP0910017A2 EP98402552A EP98402552A EP0910017A2 EP 0910017 A2 EP0910017 A2 EP 0910017A2 EP 98402552 A EP98402552 A EP 98402552A EP 98402552 A EP98402552 A EP 98402552A EP 0910017 A2 EP0910017 A2 EP 0910017A2
Authority
EP
European Patent Office
Prior art keywords
remote
remote object
group
computer
active
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP98402552A
Other languages
English (en)
French (fr)
Other versions
EP0910017A3 (de
Inventor
Ann M. Wollrath
Peter C. Jones
James H. Waldo
Robert W. Scheifler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sun Microsystems Inc
Original Assignee
Sun Microsystems Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sun Microsystems Inc filed Critical Sun Microsystems Inc
Publication of EP0910017A2 publication Critical patent/EP0910017A2/de
Publication of EP0910017A3 publication Critical patent/EP0910017A3/de
Ceased legal-status Critical Current

Links

Images

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00Arrangements for program control, e.g. control units
    • G06F9/06Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/46Multiprogramming arrangements
    • G06F9/54Interprogram communication
    • G06F9/547Remote procedure calls [RPC]; Web services
    • G06F9/548Object oriented; Remote method invocation [RMI]

Definitions

  • the present invention relates generally to distributed computer systems, and more specifically, to managing and activating objects in distributed computer systems.
  • a distributed computer system is a network of computer processors that although geographically separated, are linked together functionally. It is often desirable to execute a computer program, or portions of a computer program, simultaneously across several computer processors in the distributed system. In such an environment, protocols coordinating the various portions of the program(s) are necessary.
  • a local computer system may access objects on remote computer systems.
  • the objects to be accessed on the remote computer system take up processor resources, i.e., if they consume physical or virtual memory and have a thread of control, they are said to be "active.”
  • processor resources i.e., if they consume physical or virtual memory and have a thread of control
  • active objects include running programs or objects that are part of active programs. Such objects are always taking up resources from the physical machine, even when they are not doing active work on behalf of themselves or at the request of some other object.
  • a “passive” object refers to a presently non-active object on the remote computer. If a passive object is "activatable,” it may, at the request of the client computer system, be brought into an active state. Objects may be passive simply because they have never been instantiated. Alternatively, to save system resources, active objects may be de-activated and become passive. In particular, for active objects that have become quiescent, it may be advantageous for the computer to save the state information of the object to a stable storage medium, such as a magnetic disk, and release any memory or threads of control associated with the object. The de-activated object does not take up physical or virtual memory and is not associated with a control thread, although it continues to exist and may be made active when called.
  • CORBA Common Object Request Broker Architecture
  • a first aspect of the present invention includes a method of calling a remote object by a process comprising the steps of: (1) calling the remote object directly using a first address in a faulting remote reference to the remote object when the reference refers to an active instance of the remote object; and (2) calling an activator object using a second address in the faulting remote reference to perform activation of the remote object when the reference to the remote object does not refer to an active instance of the remote object.
  • a computer readable medium contains instructions for performing similar steps.
  • a second method consistent with the present invention includes a method of handling an object call at a remote site for a remote object, the method comprises the steps of: (1) determining whether a first predefined group of objects corresponding to the called remote object is active; (2) activating the remote object within the first group when the determining step determines that the first group is active; and (3) creating a second group of objects and activating the remote object within the second group when the determining step determines that the first group is not active.
  • an alternative aspect includes a computer readable medium containing instructions for performing similar steps.
  • a distributed computer system consistent with the present invention includes a plurality of elements, including first and second computers.
  • the second computer receives requests for remote objects from the first computer and executes an object activator performing the steps of: (1) determining whether a first predefined group of objects corresponding to the requested remote object is active; (2) activating the requested remote object within the first group of objects when the determining step determines that the first group of objects is active; and (3) creating a second group of objects and activating the requested remote object within the second group of objects when the determining step determines that the first group of objects is not active.
  • the distributed computer system uses a single interface at the client site to handle calls to call both active and activatable remote objects. Further, remote objects are aggregated into common groups of objects, thereby providing greater security between objects of disparate groups and efficiency between related objects of the same group.
  • Fig. 1 is a high-level block diagram illustrating interaction of hardware and software components in an exemplary distributed computer system.
  • Computer 102 includes a computer hardware/processing section 107 executing programs from memory section 103.
  • Memory 103 is preferably a random access memory, but may additionally or alternatively include other storage media such as magnetic or optical disks.
  • Memory 103 stores one or more computer procedures 104a, 104b, and 104c, such as, for example, a computer program, thread, or object.
  • Computer threads 104a and 104b are programs comprised of Java bytecodes executing through a Java virtual machine 105.
  • the virtual machine is itself a process that when executed on computer 102, translates threads 104a and 104b into computer instructions native to computer hardware 107. In this manner, virtual machine 105 acts as an interpreter for computer hardware 107.
  • program 104c uses instructions native to computer hardware 107, and thus does not require virtual machine 105.
  • Computer 102 is connected via network 120 to computer 112.
  • Computer 112 includes components similar to those of computer 102, and will therefore not be described further.
  • the simple network described above includes only two computers, networks of many computers, or even networks of many thousands of computers, such as the Internet, may be used to implement the concepts of the present invention.
  • Computer system 102 will be described as the requester of remote objects.
  • Computer system 112 executes the remote objects and returns results to computer 102.
  • a plurality of computer systems 112 may execute multiple objects for a single host computer 102.
  • Fig. 2 is a block diagram illustrating software entities located on computer 102.
  • Process 202 is a program active on computer 102, such as process 104 in Fig. 1. As shown, process 202 includes a plurality of bytecodes that may be translated from instructions written in the Java programming language, including instruction 203, which is an invocation to a method residing in an object on remote computer 112. The method invocation is preferably defined to be handled by local proxy object 205, which functions as an interface for remote object calls from computer 102 and hides the remote calling protocol from the invocating process.
  • Proxy 205 may assume one of multiple implementations depending on the status of the object being referenced; such as whether the object is active or activatable (i.e., presently passive). When called by process 202, proxy 205 packages the call using the appropriate implementation and forwards it to remote computer 112. Results received from the remote computer, such as results from the method invocation, are passed back through proxy 205 to process 202.
  • proxy 205 enables process 202 to make a single method invocation for both active and activatable objects. In other words, process 202 is not required to monitor whether a remote object is active or activatable.
  • faulting remote reference 210 For each remote object, faulting remote reference 210 is used to "fault in” the object's reference upon the first method invocation to the object.
  • Faulting remote reference 210 includes a persistent handle (an activation identifier) 211 and a transient remote reference 212. Both persistent handle 211 and transient remote reference 212 are obtained from the remote computer corresponding to the remote object, and contain address information for contacting the remote computer, such as the appropriate network address and port number, and address information more specific to the remote object being referred.
  • Persistent handle 211 is the more general reference and references an activator entity (described in more detail below) at the remote host.
  • Reference 212 is the actual "live" reference to the active remote object, and is used to contact the remote object directly.
  • proxy 205 In operation, upon invocation of a method requiring a remote object, proxy 205 checks reference 210. A null value in "live" reference 212 indicates that the remote object may become passive (i.e., it is not an active-only object), and proxy 205 uses activation identifier 211 to contact an activator entity at the remote site. If reference 212 is not null it will point directly to the remote object. This indicates an active remote object, which proxy 205 contacts directly.
  • Fig. 3 is a block diagram illustrating software entities located on host computer 112.
  • host computer 112 is contacted by the client using either the activation identifier reference 211 or "live" reference 212.
  • Activation identifier reference 211 references object activator 302, which supervises object activation on the host.
  • Activator 302 functions as: (1) a database that maps activation identifiers 211 to the information necessary to activate an object (e.g., the object's class, the location-- a URL-- from where the class can be loaded, specific data the object may need to bootstrap, etc.); (2) a database for tracking the current mapping of activation identifiers to active objects; and (3) a manager of Java virtual machines.
  • Activatable objects are defined by the designer to exist as a member of a group of objects, such as group 305.
  • the designer preferably assigns objects to particular groups so that objects within a group are designed to interact with one another. For example, objects within a group should have a relationship of mutual trust strong enough to allow them all to run within a single Java virtual machine. Once assigned to a group, objects stay within that group.
  • Activation entity 304 manages object group 305.
  • activation entity 304 activates passive objects and creates objects pursuant to requests from object activator 302, and returns a reference to the corresponding activated object to object activator 302.
  • activation entity 304 allocates the appropriate operating system resources (memory, process, or thread allocation) and starts up the object.
  • activation entity 304 passes information to object activator 302 describing the way in which the object is to be reached for further communication.
  • Object activator 302 may then forward this information to proxy 205, which appropriately updates faulting remote reference 210. If an object later de-activates, or is de-activated, object activator 302 similarly communicates with proxy 205 to update the faulting remote reference.
  • one activation entity 304 exists per each active Java virtual machine.
  • Fig. 4 is a flow chart further illustrating steps consistent with the present invention.
  • proxy 205 determines if the transient remote reference (the "live" reference) 212 at computer 102 is present, i.e., if it is not null, and proxy 205 contacts the active remote object (steps 402, 404). Otherwise, proxy 205 uses persistent handle 211 within reference 210 to contact object activator 302 (steps 402, 406).
  • Object activator 302 uses information within reference 210 to determine if an object group corresponds to the invocated object (step 408).
  • an activation request for the called object is forwarded to the appropriate activation entity (steps 408, 410), and the object is activated (step 411). Otherwise, the activator object first creates a new virtual machine and a new activation entity (steps 408, 412), and then forwards the activation request to the newly created activation entity, (step 414), at which point the object is activated (step 415). In response to forwarding an activation request to an activation entity, the object activator will usually receive an updated network address and port number, which it forwards to proxy object 205 (step 416).
  • object groups such as group 305 form the basic unit of object activation.
  • Object activator 302 and activation entities 304 manage the object groups, such that if a group has not been activated then a call to any object of an object group will cause the activation of that object group and the called object in a new Java virtual machine.
  • Clustering objects within an object group on a single Java virtual machine allows related objects to share an address space, which in turn allows close communication between the objects.
  • Objects in different groups are in different Java virtual machines and thus have a much stronger security separation, ensuring that those objects will not interfere, either intentionally or unintentionally, with each other.
  • a single interface is seen by clients attempting to call remote objects.
  • the interface has multiple implementations depending on the status of the object being referenced, allowing for transparent mixing of active and passive (i.e., activatable) objects in the same system, supporting both without requiring that the clients of those objects have any knowledge of whether or not the object is activatable.
  • This interface provides the client the ability to make any calls that are supported by the remote object through a faulting remote reference.

Landscapes

  • Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Multi Processors (AREA)
  • Computer And Data Communications (AREA)
EP98402552A 1997-10-15 1998-10-14 Fernobjektaufrufssystem in einem verteilten System Ceased EP0910017A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US950760 1997-10-15
US08/950,760 US6957427B1 (en) 1997-10-15 1997-10-15 Remote object activation in a distributed system

Publications (2)

Publication Number Publication Date
EP0910017A2 true EP0910017A2 (de) 1999-04-21
EP0910017A3 EP0910017A3 (de) 2003-07-30

Family

ID=25490834

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98402552A Ceased EP0910017A3 (de) 1997-10-15 1998-10-14 Fernobjektaufrufssystem in einem verteilten System

Country Status (3)

Country Link
US (1) US6957427B1 (de)
EP (1) EP0910017A3 (de)
JP (1) JPH11224203A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7577959B2 (en) 2004-06-24 2009-08-18 International Business Machines Corporation Providing on-demand capabilities using virtual machines and clustering processes

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6751658B1 (en) * 1999-10-18 2004-06-15 Apple Computer, Inc. Providing a reliable operating system for clients of a net-booted environment
US6876991B1 (en) 1999-11-08 2005-04-05 Collaborative Decision Platforms, Llc. System, method and computer program product for a collaborative decision platform
GB0108913D0 (en) * 2001-04-10 2001-05-30 Salamander Organization The Lt A method and apparatus for accessing software-based systems
WO2003073291A1 (en) * 2002-02-21 2003-09-04 Bea Systems, Inc. System and method for dynamic activation of enterprise java beans
AU2003215359A1 (en) * 2002-02-21 2003-09-09 Bea Systems, Inc. System and method for object activation
DE602006014360D1 (de) * 2006-04-13 2010-07-01 Microsoft Corp Virtuelles Ausführungssystem für ressourcen-beschränkte Geräte
US7788243B2 (en) * 2006-09-08 2010-08-31 Sybase, Inc. System and methods for optimizing data transfer among various resources in a distributed environment
US7831772B2 (en) * 2006-12-12 2010-11-09 Sybase, Inc. System and methodology providing multiple heterogeneous buffer caches
US7945949B2 (en) * 2007-03-19 2011-05-17 Microsoft Corporation Providing remote services to legacy applications
US20100174575A1 (en) * 2009-01-02 2010-07-08 International Business Machines Corporation Meeting management system with failover and failback capabilities for meeting moderators
US9524147B2 (en) * 2013-05-10 2016-12-20 Sap Se Entity-based cross-application navigation
US9875120B2 (en) * 2013-06-24 2018-01-23 Microsoft Technology Licensing, Llc Virtualized components in computing systems
US11809839B2 (en) 2022-01-18 2023-11-07 Robert Lyden Computer language and code for application development and electronic and optical communication

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0733970A1 (de) * 1995-03-22 1996-09-25 Sun Microsystems, Inc. Vorrichtung und Verfahren zur Verwaltung von Objektsammlungen

Family Cites Families (108)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2476349A1 (fr) 1980-02-15 1981-08-21 Philips Ind Commerciale Systeme de traitement de donnees reparti
US4491946A (en) 1981-03-09 1985-01-01 Gould Inc. Multi-station token pass communication system
US4558413A (en) 1983-11-21 1985-12-10 Xerox Corporation Software version management system
JPH0640302B2 (ja) 1984-01-30 1994-05-25 株式会社日立製作所 図式・ソ−スプログラム自動生成方法
US4567359A (en) 1984-05-24 1986-01-28 Lockwood Lawrence B Automatic information, goods and services dispensing system
US4823122A (en) 1984-06-01 1989-04-18 Digital Equipment Corporation Local area network for digital data processing system
US4809160A (en) 1985-10-28 1989-02-28 Hewlett-Packard Company Privilege level checking instruction for implementing a secure hierarchical computer system
US4713806A (en) 1986-03-14 1987-12-15 American Telephone And Telegraph Company, At&T Bell Laboratories Communication system control arrangement
US4939638A (en) 1988-02-23 1990-07-03 Stellar Computer Inc. Time sliced vector processing
US5724540A (en) 1988-03-28 1998-03-03 Hitachi, Ltd. Memory system having a column address counter and a page address counter
US5287511A (en) 1988-07-11 1994-02-15 Star Semiconductor Corporation Architectures and methods for dividing processing tasks into tasks for a programmable real time signal processor and tasks for a decision making microprocessor interfacing therewith
US5201049A (en) * 1988-09-29 1993-04-06 International Business Machines Corporation System for executing applications program concurrently/serially on different virtual machines
JPH0293952A (ja) 1988-09-30 1990-04-04 Hitachi Ltd 仮想計算機システム
US5133075A (en) 1988-12-19 1992-07-21 Hewlett-Packard Company Method of monitoring changes in attribute values of object in an object-oriented database
US5109486A (en) 1989-01-06 1992-04-28 Motorola, Inc. Distributed computer system with network and resource status monitoring
US5088036A (en) 1989-01-17 1992-02-11 Digital Equipment Corporation Real time, concurrent garbage collection system and method
US4992940A (en) 1989-03-13 1991-02-12 H-Renee, Incorporated System and method for automated selection of equipment for purchase through input of user desired specifications
US5297283A (en) 1989-06-29 1994-03-22 Digital Equipment Corporation Object transferring system and method in an object based computer operating system
US5257369A (en) 1990-10-22 1993-10-26 Skeen Marion D Apparatus and method for providing decoupling of data exchange details for providing high performance communication between software processes
US5557798A (en) 1989-07-27 1996-09-17 Tibco, Inc. Apparatus and method for providing decoupling of data exchange details for providing high performance communication between software processes
US5187787B1 (en) 1989-07-27 1996-05-07 Teknekron Software Systems Inc Apparatus and method for providing decoupling of data exchange details for providing high performance communication between software processes
US5218699A (en) 1989-08-24 1993-06-08 International Business Machines Corporation Remote procedure calls in heterogeneous systems
US5253165A (en) 1989-12-18 1993-10-12 Eduardo Leiseca Computerized reservations and scheduling system
EP0463172A1 (de) 1989-12-26 1992-01-02 Fujitsu Limited Objektorientiertes verteiltes verarbeitungssystem
GB2242293A (en) 1990-01-05 1991-09-25 Apple Computer Apparatus and method for dynamic linking of computer software components
AU628753B2 (en) 1990-08-14 1992-09-17 Digital Equipment Corporation Method and apparatus for implementing server functions in a distributed heterogeneous environment
ATE154850T1 (de) 1990-09-17 1997-07-15 Cabletron Systems Inc Netzwerkverwaltungssystem mit modellbasierter intelligenz
US5319542A (en) 1990-09-27 1994-06-07 International Business Machines Corporation System for ordering items using an electronic catalogue
US5327559A (en) 1990-10-23 1994-07-05 International Business Machines Corporation Remote and batch processing in an object oriented programming system
DE69228621T2 (de) * 1991-02-25 1999-07-22 Hewlett Packard Co Objektorientiertes verteiltes Rechnersystem
EP0501613A3 (en) 1991-02-28 1993-09-01 Hewlett-Packard Company Heterogeneous software configuration management apparatus
US5293614A (en) 1991-04-08 1994-03-08 Texas Instruments Incorporated System and method for hard real-time garbage collection requiring a write barrier but no read barrier
US5481721A (en) 1991-07-17 1996-01-02 Next Computer, Inc. Method for providing automatic and dynamic translation of object oriented programming language-based message passing into operation system message passing using proxy objects
FR2680255B1 (fr) 1991-08-09 1994-01-28 Gerbaulet Jean Pierre Dispositif pour une meilleure gestion des operations courantes d'achat de produits et de services.
DE4131380A1 (de) 1991-09-20 1993-03-25 Siemens Ag Verfahren zur adaption einer objektorientierten applikation
US5303042A (en) 1992-03-25 1994-04-12 One Touch Systems, Inc. Computer-implemented method and apparatus for remote educational instruction
US5390328A (en) 1992-03-30 1995-02-14 International Business Machines Corporation Data processing system and method for providing notification in a central processor of state changes for shared data structure on external storage
US5412717A (en) 1992-05-15 1995-05-02 Fischer; Addison M. Computer system security method and apparatus having program authorization information data structures
US5339430A (en) 1992-07-01 1994-08-16 Telefonaktiebolaget L M Ericsson System for dynamic run-time binding of software modules in a computer system
US5307490A (en) 1992-08-28 1994-04-26 Tandem Computers, Inc. Method and system for implementing remote procedure calls in a distributed computer system
JP2524472B2 (ja) 1992-09-21 1996-08-14 インターナショナル・ビジネス・マシーンズ・コーポレイション 電話回線利用の音声認識システムを訓練する方法
US5423042A (en) 1992-10-23 1995-06-06 International Business Machines Corporation Remote procedure execution
US5561785A (en) 1992-10-29 1996-10-01 International Business Machines Corporation System for allocating and returning storage and collecting garbage using subpool of available blocks
US5515536A (en) 1992-11-13 1996-05-07 Microsoft Corporation Method and system for invoking methods of an object through a dispatching interface
DE69309485T2 (de) 1992-11-13 1997-07-10 Microsoft Corp Verfahren zur verteilung von schnittstellenzeigern fur fernprozeduranrufe
US5511196A (en) 1992-11-17 1996-04-23 International Business Machines Corporation Method and system in a data processing system for the enhancement of relationships between reference objects in an object oriented environment and a data object outside an object oriented environment
US5386568A (en) 1992-12-01 1995-01-31 Yamaha Corporation Apparatus and method for linking software modules
EP0602263A1 (de) 1992-12-15 1994-06-22 International Business Machines Corporation Programmgenerator für Benutzerschnittstelle
US5560003A (en) 1992-12-21 1996-09-24 Iowa State University Research Foundation, Inc. System and hardware module for incremental real time garbage collection and memory management
US5452459A (en) 1993-01-08 1995-09-19 Digital Equipment Corporation Method and apparatus for allocating server access in a distributed computing environment
US5548724A (en) 1993-03-22 1996-08-20 Hitachi, Ltd. File server system and file access control method of the same
US5475840A (en) 1993-04-13 1995-12-12 Sun Microsystems, Inc. High performance dynamic linking through caching
US5459837A (en) 1993-04-21 1995-10-17 Digital Equipment Corporation System to facilitate efficient utilization of network resources in a computer network
CA2140244A1 (en) 1993-05-20 1994-12-08 John D. Doyle Computer integration network for channeling customer orders through a centralized computer to various suppliers
JP3365576B2 (ja) * 1993-06-14 2003-01-14 インターナショナル・ビジネス・マシーンズ・コーポレーション オブジェクトの実行方法および装置
US5446901A (en) 1993-06-30 1995-08-29 Digital Equipment Corporation Fault tolerant distributed garbage collection system and method for collecting network objects
US5506984A (en) 1993-06-30 1996-04-09 Digital Equipment Corporation Method and system for data retrieval in a distributed system using linked location references on a plurality of nodes
US5603031A (en) 1993-07-08 1997-02-11 General Magic, Inc. System and method for distributed computation based upon the movement, execution, and interaction of processes in a network
US5666493A (en) 1993-08-24 1997-09-09 Lykes Bros., Inc. System for managing customer orders and method of implementation
US5617537A (en) 1993-10-05 1997-04-01 Nippon Telegraph And Telephone Corporation Message passing system for distributed shared memory multiprocessor system and message passing method using the same
US5455952A (en) 1993-11-03 1995-10-03 Cardinal Vision, Inc. Method of computing based on networks of dependent objects
US5742848A (en) 1993-11-16 1998-04-21 Microsoft Corp. System for passing messages between source object and target object utilizing generic code in source object to invoke any member function of target object by executing the same instructions
US5581704A (en) 1993-12-06 1996-12-03 Panasonic Technologies, Inc. System for maintaining data coherency in cache memory by periodically broadcasting invalidation reports from server to client
US5548726A (en) 1993-12-17 1996-08-20 Taligeni, Inc. System for activating new service in client server network by reconfiguring the multilayer network protocol stack dynamically within the server node
US5594921A (en) 1993-12-17 1997-01-14 Object Technology Licensing Corp. Authentication of users with dynamically configurable protocol stack
WO1995019008A1 (en) 1994-01-05 1995-07-13 Covey Peter J Dynamic-state, multi-dimensional, multi-media database
US5664111A (en) 1994-02-16 1997-09-02 Honicorp, Inc. Computerized, multimedia, network, real time, interactive marketing and transactional system
US5592375A (en) 1994-03-11 1997-01-07 Eagleview, Inc. Computer-assisted system for interactively brokering goods or services between buyers and sellers
GB2288477A (en) * 1994-04-05 1995-10-18 Ibm Communications system for exchanging data between computers in a network.
US5392280A (en) 1994-04-07 1995-02-21 Mitsubishi Electric Research Laboratories, Inc. Data transmission system and scheduling protocol for connection-oriented packet or cell switching networks
US5675796A (en) 1994-04-08 1997-10-07 Microsoft Corporation Concurrency management component for use by a computer program during the transfer of a message
US5680617A (en) 1994-05-16 1997-10-21 Apple Computer, Inc. Computer-human interface which provides for user customization of object behavior
US5675797A (en) 1994-05-24 1997-10-07 International Business Machines Corporation Goal-oriented resource allocation manager and performance index technique for servers
EP0684553B1 (de) 1994-05-26 2004-06-16 Sun Microsystems, Inc. Verfahren und Gerät zur Erzeugung und Verwendung kurzer Operationsidentifizierer in objektorientierten Systemen
US5655148A (en) 1994-05-27 1997-08-05 Microsoft Corporation Method for automatically configuring devices including a network adapter without manual intervention and without prior configuration information
US5664191A (en) 1994-06-30 1997-09-02 Microsoft Corporation Method and system for improving the locality of memory references during execution of a computer program
US5680573A (en) 1994-07-12 1997-10-21 Sybase, Inc. Method of buffering data objects in a database
US5555367A (en) 1994-09-30 1996-09-10 General Electric Company Method and system for generating computer programs for queries formed by manipulating object-oriented diagrams
US5715314A (en) 1994-10-24 1998-02-03 Open Market, Inc. Network sales system
US5577231A (en) 1994-12-06 1996-11-19 International Business Machines Corporation Storage access authorization controls in a computer system using dynamic translation of large addresses
US5664110A (en) 1994-12-08 1997-09-02 Highpoint Systems, Inc. Remote ordering system
US5644768A (en) 1994-12-09 1997-07-01 Borland International, Inc. Systems and methods for sharing resources in a multi-user environment
US5553282A (en) 1994-12-09 1996-09-03 Taligent, Inc. Software project history database and method of operation
EP0717337B1 (de) 1994-12-13 2001-08-01 International Business Machines Corporation Verfahren und System zur gesicherten Programmenverteilung
JPH08235260A (ja) 1995-03-01 1996-09-13 Fujitsu Ltd マルチメディア通信システム
US5793965A (en) * 1995-03-22 1998-08-11 Sun Microsystems, Inc. Method and apparatus for determining the type of an object in a distributed object system
US5724503A (en) * 1995-03-31 1998-03-03 Sun Microsystems, Inc. Method and apparatus for interpreting exceptions in a distributed object system
US5721832A (en) 1995-05-12 1998-02-24 Regal Greetings & Gifts Inc. Method and apparatus for an interactive computerized catalog system
US5628005A (en) 1995-06-07 1997-05-06 Microsoft Corporation System and method for providing opportunistic file access in a network environment
US5745703A (en) 1995-07-18 1998-04-28 Nec Research Institute, Inc. Transmission of higher-order objects across a network of heterogeneous machines
US5644720A (en) 1995-07-31 1997-07-01 West Publishing Company Interprocess communications interface for managing transaction requests
US5710887A (en) 1995-08-29 1998-01-20 Broadvision Computer system and method for electronic commerce
US5671225A (en) 1995-09-01 1997-09-23 Digital Equipment Corporation Distributed interactive multimedia service system
US5737607A (en) * 1995-09-28 1998-04-07 Sun Microsystems, Inc. Method and apparatus for allowing generic stubs to marshal and unmarshal data in object reference specific data formats
US5671279A (en) 1995-11-13 1997-09-23 Netscape Communications Corporation Electronic commerce using a secure courier system
US5787427A (en) * 1996-01-03 1998-07-28 International Business Machines Corporation Information handling system, method, and article of manufacture for efficient object security processing by grouping objects sharing common control access policies
US5745695A (en) 1996-01-16 1998-04-28 Motorola Inc. Radio system with suspension of packet data service during non-data service connection
US5754849A (en) 1996-01-30 1998-05-19 Wayfarer Communications, Inc. Self-describing object providing dynamic manipulation of heterogeneous data values and semantic identity between memory and transmission representations
US5754977A (en) 1996-03-06 1998-05-19 Intervoice Limited Partnership System and method for preventing enrollment of confusable patterns in a reference database
US5706502A (en) 1996-03-25 1998-01-06 Sun Microsystems, Inc. Internet-enabled portfolio manager system and method
US5729594A (en) 1996-06-07 1998-03-17 Klingman; Edwin E. On-line secured financial transaction system through electronic media
US5727145A (en) 1996-06-26 1998-03-10 Sun Microsystems, Inc. Mechanism for locating objects in a secure fashion
US5748897A (en) 1996-07-02 1998-05-05 Sun Microsystems, Inc. Apparatus and method for operating an aggregation of server computers using a dual-role proxy server computer
US5742768A (en) 1996-07-16 1998-04-21 Silicon Graphics, Inc. System and method for providing and displaying a web page having an embedded menu
US5757925A (en) 1996-07-23 1998-05-26 Faybishenko; Yaroslav Secure platform independent cross-platform remote execution computer system and method
US5758077A (en) 1996-08-02 1998-05-26 Hewlett-Packard Company Service-centric monitoring system and method for monitoring of distributed services in a computing network
US6553428B1 (en) * 1996-11-18 2003-04-22 International Business Machines Corporation Distributed object instantiation of native objects in java
US5901315A (en) * 1997-06-13 1999-05-04 International Business Machines Corporation Method for debugging a Java application having native method dynamic load libraries

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0733970A1 (de) * 1995-03-22 1996-09-25 Sun Microsystems, Inc. Vorrichtung und Verfahren zur Verwaltung von Objektsammlungen

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CAHILL V ET AL: "THE AMADEUS GRT - GENERIC RUNTIME SUPPORT FOR DISTRIBUTED PERSISTENT PROGRAMMING" ACM SIGPLAN NOTICES, ASSOCIATION FOR COMPUTING MACHINERY, NEW YORK, US, vol. 28, no. 10, 1 October 1993 (1993-10-01), pages 144-161, XP000411723 ISSN: 0362-1340 *
WOLLRATH A ET AL: "A DISTRIBUTED OBJECT MODEL FOR THE JAVA(TM) SYSTEM" CONFERENCE ON OBJECT-ORIENTED TECHNOLOGIES, XX, XX, 17 June 1996 (1996-06-17), pages 219-231, XP000997457 *
WOLLRATH A ET AL: "SIMPLE ACTIVATION FOR DISTRIBUTED OBJECTS" PROCEEDINGS OF THE USENIX CONFERENCE, XX, XX, 26 June 1995 (1995-06-26), pages 1-11, XP008014702 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7577959B2 (en) 2004-06-24 2009-08-18 International Business Machines Corporation Providing on-demand capabilities using virtual machines and clustering processes

Also Published As

Publication number Publication date
EP0910017A3 (de) 2003-07-30
US6957427B1 (en) 2005-10-18
JPH11224203A (ja) 1999-08-17

Similar Documents

Publication Publication Date Title
US5396630A (en) Method and system for object management across process boundries in a data processing system
EP0501610B1 (de) Objektorientiertes verteiltes Rechnersystem
US5969967A (en) Methods and apparatus for conspiracy between objects
US5818448A (en) Apparatus and method for identifying server computer aggregation topologies
US6629153B1 (en) Method and apparatus for providing peer ownership of shared objects
US5748897A (en) Apparatus and method for operating an aggregation of server computers using a dual-role proxy server computer
US6115736A (en) System and method for automatically localizing access to remote network components using implicit agent relocation
EP0660234B1 (de) Verfahren und System für Fernausführung von Codes
US6336147B1 (en) Method and apparatus for managing connections for communication among objects in a distributed object system
US7827217B2 (en) Method and system for a grid-enabled virtual machine with movable objects
EP0737916B1 (de) Verfahren, Vorrichtung und Datenstrukturen zur Objektverwaltung
US8407718B2 (en) Method and apparatus for composite user interface generation
US6353860B1 (en) Methods and apparatus for managing collections of objects
US20060184535A1 (en) Suspension and resuming of sessions
US20050204045A1 (en) Mechanism for enabling session information to be shared across multiple processes
US6957427B1 (en) Remote object activation in a distributed system
US7827230B2 (en) Cell-based computing platform where services and agents interface within cell structures to perform computing tasks
JPH0916503A (ja) コンピュータプロセスを管理する方法および装置
JPH1083308A (ja) スタブ検索及びローディング・サブシステム、スタブ検索及びローディング方法並びにスタブ検索及びローディング用記録媒体
WO2000010084A2 (en) Object load balancing
US6247039B1 (en) Method and apparatus for disposing of objects in a multi-threaded environment
US6625641B1 (en) Method and apparatus for providing client support without installation of server software
EP1061445A2 (de) Web-basierte Unternehmensverwaltung mit übertragungsunabhängiger Kundenschnittstelle
US7146414B1 (en) Object bridge for providing access to operations-level control of a data processing system
US20030200253A1 (en) Common thread server

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SUN MICROSYSTEMS, INC.

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SUN MICROSYSTEMS, INC.

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17P Request for examination filed

Effective date: 20031222

AKX Designation fees paid

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 20040616

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20060402